Jan 16, 2010

Somethin to do with blood

The structure of blood vessels.

The composition of mammalian blood.

Differentiation of blood cells. Some of the pluripotent stem cells differentiate into lymphoid stem cells, which then develop into B cells and T cells, two types of lymphocytes that function in the immune response. All other blood cells differentiate from myeloid stem cells.

Blood clotting

Atherosclerosis. These light micrographs contrast a cross section of (a) a normal (healthy) artery with (b) an artery partially blocked by an atherosclerotic plaque. Plaques consist mostly of fibrous connective tissue and smooth muscle cells infiltrated with lipids.

Additional info

  • Arteriosclerosis is any hardening (and loss of elasticity) of large arteries and arterioles (small arteries). It is often due to hypertension.

  • Artherosclerosis is a hardening of an artery specifically due to an atheromatous plaque. Atherosclerosis is the most common form of arteriosclerosis. Atherosclerosis is characterised by a thickening of the intima with plaques that can contain lipid-laden macrophages ("foam cells"). The plaques contain free lipid (cholesterol, etc.) and are prone to calcification and ulceration.